Thyroid disease, especially hypothyroidism, and fibromyalgia share many symptoms.

Despite the associations, theories about the cause of these related conditions are not concrete.

Researchers have proposed autoimmunity, dysfunction of the hypothalamus, and more possibilities.

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Who They Affect

Thyroid disease and fibromyalgia are each very common in the United States.

These numbers do not include others who may be undiagnosed.

Combined Occurrence

Not only are hypothyroidism and fibromyalgia both common, but they frequently occur together.

Doctor Discussion Guide Woman

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There is a great deal of controversy about the underlying cause of fibromyalgia.

The autoimmune basis of Hashimoto’s disease is supported by the presence of anti-thyroperoxidase (TPO) antibodies.

Trauma

As with some infections, both autoimmune thyroid disease and fibromyalgia are sometimes preceded by trauma.

Trauma activates the immune system.

This activation might lead to a hyperactive immune state (causing autoimmunity) after the injury has resolved.

Diagnosis

Hypothyroidism and fibromyalgia can both be misdiagnosed.

During an evaluation for possible fibromyalgia, thyroid function testing is usually done.

Get our printable guide for your next doctor’s appointment to help you ask the right questions.

Since everyone is different, it’s important to know your own body.

Centers for Disease Control and Prevention.Fibromyalgia.

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Chaker L, Bianco AC, Jonklaas J, Peeters RP.Hypothyroidism.Lancet.

33(7):885-891.